IMPROVED FLEXIBLE METHOD FOR PRODUCING OIL BASES AND MIDDLE DISTILLATES WITH HYDROISOMERIZATION-CONVERSION FOLLOWED BY CATALYTIC DEWAXING

摘要

The invention and so produce high-quality base oil, and at the same time as, the method relates to an improved process for producing a high-quality middle distillate comprises a continuous phase and a hydrogenation-isomerization catalyst talrap step.; The hydrogenation-isomerization step is carried out in the presence of a catalyst containing the at least one noble metal deposited on an amorphous acidic support, the dispersion of the metal is 20% to 100%. The support is amorphous silica-alumina is preferred.; Catalyst talrap step is carried out in the presence of a catalyst containing the molecular sieve at least one selected from the first jong hydrogenation dehydrogenation element (VIII-group) and ZBM-30, EU-2 and EU-11 or more.